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    Calcium Hardness Increaser
      Calcium Hardness Increaser is rated 4.7 out of 5 by 11.
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    WHEN LEVELS DROP BELOW 150ppm, ADD CALCIUM HARDNESS INCREASER TO PREVENT CORROSIVE WATER THAT DAMAGES YOUR EQUIPMENT!

    Containing calcium chloride and available in granular form, our calcium hardness increaser is convenient to use and will work quickly to increase calcium hardness in your swimming pool so you can rest easy knowing that your pool equipment is protected.
    • A low hardness level can cause corrosion of your pool's plumbing and heater as well as stain or etch your pool's surface.
    • When the hardness of your pool water drops below 150 ppm, just add Calcium Hardness Increaser.
    • Calcium Hardness Increaser protects your pool from damage caused by corrosive water.
    • Special formula works quickly and effectively.
    • Calcium Hardness Increaser is easy to use and will restore your pool's water chemistry by raising the level of dissolved calcium present in the pool water.
    • Use together with calcium hardness test strips.
    • Available in various sizes.
    • Economically and competitively priced.
    • Granular. Calcium Chloride.
    • Dosage: 6 lbs. per 10,000 gallons will raise the hardness level approximately 50 ppm.
    more information
      • Qty.
      • Item No.
      • Item Name
      • Only!
      • Y7200
      • 5 lb. Bag
      • 5 lb. Bag
      • Y7200
      • $18.99
      • Y7210
      • 25 lb. Pail
      • 25 lb. Pail
      • Y7210
      • $42.99
      • Y7220
      • 45 lb. Pail
      • 45 lb. Pail
      • Y7220
      • $65.99
      • Y7250
      • 90 lb. (2 X 45 lb.)
      • 90 lb. (2 X 45 lb.)
      • Y7250
      • $124.99
      WHEN LEVELS DROP BELOW 150ppm, ADD CALCIUM HARDNESS INCREASER TO PREVENT CORROSIVE WATER THAT DAMAGES YOUR EQUIPMENT!

      Containing calcium chloride and available in granular form, our calcium hardness increaser is convenient to use and will work quickly to increase calcium hardness in your swimming pool so you can rest easy knowing that your pool equipment is protected.
      • A low hardness level can cause corrosion of your pool's plumbing and heater as well as stain or etch your pool's surface.
      • When the hardness of your pool water drops below 150 ppm, just add Calcium Hardness Increaser.
      • Calcium Hardness Increaser protects your pool from damage caused by corrosive water.
      • Special formula works quickly and effectively.
      • Calcium Hardness Increaser is easy to use and will restore your pool's water chemistry by raising the level of dissolved calcium present in the pool water.
      • Use together with calcium hardness test strips.
      • Available in various sizes.
      • Economically and competitively priced.
      • Granular. Calcium Chloride.
      • Dosage: 6 lbs. per 10,000 gallons will raise the hardness level approximately 50 ppm.
      more information
      • More Information
      • Customer Reviews
      • MORE INFO

      Corrosive water comes from calcium hardness levels dropping under ideal range in a pool. Low calcium hardness damages pool equipment, so it is imperative to use calcium hardness increaser to bring up the pool's calcium hardness levels. Calcium hardness is a measure of all the dissolved calcium present in your pool's water. When the calcium hardness level of your pool drops below the ideal range, you will end up with corrosive water. As low calcium hardness can damage your pool and pool equipment by causing corrosion, staining and etching, you will need to use calcium hardness increaser to bring your pool's calcium hardness level back up. Our swimming pool calcium hardness increaser will quickly correct pool chemical levels, restoring your pool's water chemistry and protecting your pool and equipment. Containing calcium chloride and available in granular form, our calcium hardness increaser is convenient to use and will work quickly to increase calcium hardness in your swimming pool so you can rest easy knowing that your pool equipment is protected.

      Rated 5 out of 5 by from WORKS EASY TO USE AND WORKS
      Date published: 2015-08-07
      Rated 5 out of 5 by from Calcium Chloride As usual my order was filled and delivered promptly. The instructions were clear and easy to read. The chart offering quantity of lbs to PPM was dead on. The hardness of my pool water is perfect.
      Date published: 2014-06-17
      Rated 5 out of 5 by from great price fast shipping
      Date published: 2013-07-02
      Rated 5 out of 5 by from great service fast shipping and great product
      Date published: 2012-07-09
      Rated 5 out of 5 by from Same Results for Less I hate throwing money away. I was doing that buying from the "national" company with the store near my home. I purchased from SPP for much less, and the products arrived very quickly. I have noticed no difference in quality.
      Date published: 2011-10-22
      Rated 3 out of 5 by from Prodruct seems ok Not sure how it works yet. It arrived quickly but when I mixxed it with water from the tap to shake it up in a plastic jug it had a chemical reaction and got very hot. I poured it into the pool after it was mixed in hopes it would disolve better. I am a former lifeguard and was certified in pool chemicals as an operator. This has happened with other pool chemicals but just be aware that it does get hot fast and I did not give it time to get any hotter or anythng else happening.
      Date published: 2011-09-08
      Rated 5 out of 5 by from Works great This stuff did the job! It dissolves almost instantly, doesn't need to be mixed and brought up the hardness level. It worked great!
      Date published: 2011-08-17
      Rated 5 out of 5 by from After PH balance, Fix your Calcium Calcium hardness is critical to pool water and equipment. Once you fix your PH, then immediately fix the hardness with this product. SPP has the best quality, price and delivery in the US. Get the 25 lb size. Just do it.
      Date published: 2011-07-13
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      More Information
      INGREDIENTS: granular calcium chloride.
      Ideal level for vinyl or fiberglass pools is 175-225 ppm.

      Ideal level for concrete or plaster pools is 225-300 ppm.
      How Much Do I Need?
      CALCIUM HARDNESS GUIDE
      YOUR READING YOU NEED GALLONS IN POOL
      7,500 10,000 12,500 15,000 17,500 20,000 22,500 25,000 27,500 30,000
      50 ppm calcium increaser 15 lbs. 20 lbs. 25 lbs. 30 lbs. 35 lbs. 40 lbs. 45 lbs. 50 lbs. 55 lbs. 60 lbs.
      100 ppm calcium increaser 9 lbs. 12 lbs. 15 lbs. 18 lbs. 21 lbs. 24 lbs. 27 lbs. 30 lbs. 33 lbs. 36 lbs.
      150 ppm calcium increaser 4.5 lbs. 6 lbs. 7.5 lbs. 9 lbs. 10.5 lbs. 12 lbs. 13.5 lbs. 15 lbs. 16.5 lbs. 18 lbs.
      200 ppm Desired Range!
      250 ppm
      300 ppm
      350 ppm Use Calcium Hardness Decreaser
      400 ppm Use Calcium Hardness Decreaser
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